MOUNTAIN VIEW, Calif. (AP) — Google has fired a leader of its artificial intelligence ethics team in the fallout from the recent departure of another former employee involved in the same field. Friday, Google confirmed firing Margaret Mitchell after she announced it on Twitter. The firing comes a month after Mitchell vented on Twitter about the handling of her former colleague, Timnit Gebru, who parted ways with Google late last year. Gebru, a Black woman, said she was fired in a dispute over a research paper, while Google said it had accepted her resignation. Hundreds of Google employees also have signed a petition protesting Gebru’s departure.